Berwyn Mountain UFO Incident — North Wales

On the night of January 23, 1974, residents across a wide area of North Wales were shaken by a loud bang and ground tremor, followed by reports of bright lights on the slopes of the Berwyn Mountains near Llandrillo. The event — which generated immediate calls to police — occurred at approximately 8:30 PM.

Nurse Pat Evans, who lived nearby, drove up toward the mountain believing a plane crash had occurred. She reported observing an intense, large, pulsating light on the hillside, circular in shape with a defined edge. She did not approach closely and eventually returned home. Her account is considered the strongest single-witness testimony of the event.

Police and mountain rescue teams were dispatched. The official conclusion was that the sound and tremor were caused by a simultaneous small earthquake (magnitude 3.5, centered near Bala) and a meteor or fireball passage — a coincidence of natural events.

However, a body of alternative accounts emerged over subsequent decades. Witnesses claimed to have seen military vehicles cordoning off the area and retrieving something from the hillside. Ufologist Nick Redfern collected testimony suggesting a government retrieval operation was conducted. An ex-military figure using the pseudonym "James Prescott" claimed to have been involved in securing a disc-shaped craft on the mountainside.

The official explanation accounts for the earthquake and the meteor but is less satisfying in explaining the structured, stationary light Pat Evans described — which does not fit the behavior of a fireball. The "Welsh Roswell" designation reflects both the similarities to and the significant evidentiary gaps relative to its American counterpart.